Sliding clasp fastener



Jan 27, 1942. M. wlN'rrRu-uu- TERv 2,270,985

SLIDING CLASP FASTENER Original Filed Aug. 28, 1936 Patented Jan. 27,1942 caracas sLmmG cuisr r-'AsrENEn Martin Winterhalter,Morente-Castello, near Lugano, Switzerland origini application Augustas, 1936. serislrNo.

98,308, now Patent No.

Divided and this application March 29, 1941. 22. 1941, Serial September19, 1935 8 Claims. This is a division of my co-pending application2,239,803, dtcd April 384,708. In Switzerland N0. 98,308 led August 28,1936, Patent N0.

2,239,803, granted April 29, 1941.

This invention relates to an improvement in sliding clasp fasteners, andparticularly relates to the type in which the interlocking fastenermembers are moulded on and intimately united to the opposite sides ofthe stringers. l

One of the objects of the invention is to provide a device of thischaracter in which the interlocking projections and recesses of theinterlocking members are free of mould flash, so that the projectionswill be fully seated in the recesses and not spaced therefrom by mouldflash. 'I'he further object of the invention is to fasten securely theshank members of the interlocking members to the stringers and therebyprevent movement of the interlocking members relatively to thestringers.

A still further object of theinvention is to provide a very simpleconstruction of a device of this character which can be easily producedin a two-part mould, the two parts of the moulds having no mouldingmembers projecting from one mould half into the other.

A still further object of the invention is to utilise the stringersthemselves or portions thereof as means for preventing disengagement ofthe interlocking members in a direction at right angles to the plane ofthe fastener.

The precise nature of the invention will be best understood by referenceto the accompanying drawing, in which:

Fig. 1 is a bottom plan view of one form of .as

my invention;

Fig. 2 is a transverse sectional view on line II-II of Fig. 1;

Fig. 3 is a perspective view of a portion of a stringer and severalinterlocking members thereon; l

Fig. 4 is a bottom view of a second form of my invention. and

Fig. 5 a transverse sectional view corresponding to Fig. 4.

Referring first to Figs. 1 to 3, the reference character 2 designatesthe stringers, which are provided with a thickened portion 3, at theedge thereof, and I designates the interlocking members moulded on thestringers. 25 designates a slider adapted to interlock and disengage theinterlocking members on adjacent stringers.

These interlocking members are moulded preferably by an apparatusclearly illustrated and described in my Patent No. 2,184,265, December19. 1939, the application of which is a division oi' application SerialNo. 98,308, filed August 28, 1936.

The interlocking members AI are formed with trapezoidal projections 4and corresponding recesses I4 and are shown of uniform thickness, but itwill be understood that although this is a preferred construction, it isnot essential that the members should be of uniform thickness, forinstance, the projections 4 might be shorter than the correspondingrecesses I4, that is to say, they need not extendk as far as the bottomsof the recesses I4. The projections 4 andthe recesses I4 constitute thecoupling portions of the interlocking members and prevent the movingapart of' the stringers 2' in the plane of the stringers.

The interlocking members are formed with shanks 2l.

The interlocking projections 4, the recesses I4 and the shanks 21 of theinterlocking members,v

are formed in one part of the mould so that their ends 20 and 28 are inthe plane of the stringer. The stringers 2 are formed in the second partof the mould. The Shanks 2l and parts of the projections 4 andtheportions containing the recesses 26 are moulded directly on one side ofthe stringer. This forming lof the projections and recessed portions ofthe interlocking members in one part of the mould and the fact that theyare molded directly upon one side of the stringer has the result thatany mould iiash which is formed, will be along the en'ds 26 and 20. Thisformingof the mould ash along these ends, will avoid the forming of anymould flash across the recesses or the locking projections so that thelocking projections can be fully seated in their receiving recesses. j

As the interlocking members are moulded on the stringers they aresecured throughout the entire area of the surface engagement of theinterlocking members and stringers.

In order to obtain a still better attachment of the interlocking membersto the stringers, the 'interlocking members are riveted to the stringersby means of rivets I4', I5 which are formed during the mouldingoperation inthe manner described in Patent No. 2,184,265 above referredto. This riveting of the interlocking members to the stringers isoptional and is not an essential part of my invention.

In order to prevent disengagement of the interlocking members in adirection at right angles to the plane of the whole fastening, it isnecessary to provide additional means, as in the construction shown therecesses are open at both ends. According to the invention the stringersthemselves are used as means for preventing this displacement and forthis purpose it will be seen that the stringers extend partly under theends of the recesses Il so that they partly close these recesses andform stops for the projections in the engaged position of the two partsof the fastening as is clearly shown in Fig. l. It will be seen fromFig. 1 that a locking member I on the right hand stringer 2 has aportion which rests upon the edge of the opposite stringer and isprevented thereby from moving in one direction at right angles to theplane of the fastener, whilst the edge of the right hand stringer liesunder the projecting portion of the adjacent interlocking member on theleft hand stringer and prevents disengagement in the opposite direction.In the construction shown. see particularly Fig. l, the stringers almostmeet at their opposite edges, there being only a slight 20 gap I betweenthem. It may be pointed out however, that it is not essential that thestringers should upon the whole length extend under the ends of therecesses as it would be quite sumcient for the stringers to projectunder one or two recesses to prevent the disengagement in a directionlateral to the plane of the fastener.

Inthe construction according to Figs. 4 and 5, the interlocking membersI' have each two coupling projections 23 and corresponding coupling 30recesses 24 and are moulded to one side of a stringer 2. The stringersare again extended so as to nearly meet at their inneredges and act asstops preventing disengagement in a direction vertical to the plane ofthe fastener. The interlocking members are formed in one part of themould and the stringers are located in the other part of the mold sothat the mould flash is again formed at the inner ends of the recessesand projections and does not interfere with the proper engagement of thecoupling portions with the interlocking members.

I claim:

l. A sliding clasp fastener of the type referred proximately in the sameplane, a plurality of spaced interlocking members moulded on andintimately united to one side of each stringer and having couplingportions extending beyond the stringers: each coupling portion having acoupling projection and a coupling recess, the series of couplingportions of the interlocking members on one stringer being adapted tointermesh with that on the other, the mould nash formed on the couplingportions of the interlocking members being substantially parallel to thestringers and in the end plane of the coupling portions so that' saidmould ash does not interfere with the reception of said projections bysaid recesses.

4. A sliding clasp fastener of the type referred to comprising incombination: a pair of stringers adapted to lie approximately in thesame plane, a plurality of spaced interlocking members moulded on andintimately united to one side of each stringer and having couplingportions extending beyond the stringers, the series of coupling portionsof the interlocking members on one stringer being adapted to intermeshwith that on the other, and means forinterlocking the coupling portionsof said interlocking members on one K stringer with those on the othercomprising projections moulded on the coupling portions of theinterlocking members of one stringer and cooperating recesses forvreceiving said projections moulded in the adjacent faces of the couplingprojections of said interlocking members on the other stringer, themould flash formed on the coupling portions of `the interlocking membersbeing-substantially parallel to the stringers and in the end plane ofsaid coupling recesses, so that said mould flash does not interfere withthe re- .eeption of said projections by said recesses, and

moulded rivet means integral with the interlocking members forconnecting said locking memy bers to the other sides of each stringer.

5. A sliding clasp fastener comprising lin combination: a pair ofstringers; a plurality of spaced locking members moulded on andintimately united to one side of each stringer and to comprising incombination: a pair of string- 4B havin! COllpling p0rtions extendingbeyond the ers; a plurality of interlocking members moulded directly onto one side of each of said stringers, said interlocking members havingcoupling projections and coupling recesses, the mould flash formed onthe coupling projections and coupling 50 recesses of the interlockingmembers being substantially parallel to the stringers and at the ends ofsaid recesses and projections adjacent to the stringers, so that saidmould flash does not interfere with the reception of said couplingprojections by said coupling recesses.

2. A sliding clasp fastener of the type referredV to comprising incombination: a pair of stringers; a plurality of interlocking membersmoulded directly on to one side of each of said stringers, saidinterlocking members having coupling projections and coupling recesses,the mould flash formed on the coupling projections and coupling recessesof the interlocking members being substantially parallel to thestringers and at the ends 65 of said recesses and projections adjacentto the stringers, so that said mould flash does not interfere with thereception of said coupling projections by said coupling recesses. saidinterlocking members being of uniform thickness and the 70 couplingprojections and recesses extending through the whole thickness of theinterlocking members.

3. A sliding clasp fastener comprising in oombination: a pair ofstringers adapted to lie apstringers, the series of coupling portions ofthe locking members of one stringer being adapted to intermesh with thaton the other, means for interlocking the coupling portions of saidinterlocking members on one stringer with those on the other stringercomprising moulded projections on the faces of the coupling portions ofthe members on one stringer and lco-operating moulded recesses forreceiving said projections moulded in the adjacent faces of the couplingprojectionsof said members on the other stringer, the mould ash formedon the coupling portions of the interlocking members being substantiallyparallel to the stringersand in the end plane of said recesses. so thatsaid mould flash does not interfere with the reception of saidprojections by said recesses; the edge portions of said stringers'projecting under some or all of the coupling portions extending beyondthe stringers so as to form stops preventing disengagement of thelocking members in a direction at right angles to the plane of thefastening.

6. A sliding clasp fastener of the type referred to comprising incombination: a pair of stringers; a plurality of spaced interlockingmembers moulded on and intimately united to one side of each stringerand having portions extending beyond the stringers, said interlockingmembers each having a coupling projection on a face of 7l the extendingportion and a coupling recess in the opposite face, the recesses in themembers of one stringer being arranged to receive the projeotions on themembers on the other stringer to lock the stringers together, therecesses extending down to the plane of its stringer, the mould ashformed on the interlocking members being in the plane of the Stringer sothat the interlocking projections and recesses are free of mould ash.

'7. A sliding clasp fastener of the type referred to comprising incombination: a pair of stringers; a plurality of spaced interlockingmembers moulded on and intimately united to one side of each Stringerand having portions extending beyond the stringers, said interlockingmembers each having a coupling projection on a face of the extendingportion and a coupling recess in the opposite face. the recesses in themembers of one Stringer being arranged to receive the projections on themembers on the other Stringer to lock the stringers together, therecesses extending down to the plane of its Stringer, the mould ashformed on the interlocking members being in the plane of the Stringer sothat the interlocking projections and recesses are free of mould ash,said interlocking members having-.moulded rivets formed thereon whichpass through the stringer on to which said interlocking members aremoulded and having their `heads upon the side of the Stringer oppositeto the side on which the interlocking members are moulded.

8. A sliding clasp fastener comprising in combination: a. pair ofstringers adapted .to lie in approximately the same plane, a pluralityof spaced locking members moulded on and intimately united to one sideof each Stringer and having coupling portions formed on one face with acoupling recess and on the other face with a coupling projection, saidrecesses extending through the wholethickness of the coupling portionsterminating in the plane of the Stringer, said projections alsoterminating in the plane of said Stringer, the mould ilash formed on thecoupling projections and recesses of the locking members beingsubstantially parallel to the stringers and in the end plane of saidprojections and recesses, so that said mould ash does not interfere withthe reception of said projections by said recesses.

MARTIN WINTERHALTER.

